diff --git a/library/Class/Import/Typo3.php b/library/Class/Import/Typo3.php
index cde93a4ca6d45fc223a5cfa9be98ec268012b024..a52fdc6a149169f0b6edb361f753aaeef09f92f7 100644
--- a/library/Class/Import/Typo3.php
+++ b/library/Class/Import/Typo3.php
@@ -911,6 +911,7 @@ class Class_Import_Typo3 {
 
   protected function _cleanSites() {
     $this->_cleanModelsBy('findRemovableArticles', '_getSite');
+    return $this;
   }